Windings for an electric machine
AssigneeABB Schweiz AG
InventorsRajib Mikail, Steven Englebretson, Zhiguo Pan
Life of this patent
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Abstract
There are disclosed winding configurations for electric machines that employ printed circuit board (PCB) type end winding connections to enable an automatic and faster assembly of the electric machines. The winding configurations provide a compact PCB-type end winding arrangement with an optimal fewer number of turns/bars in the slots of the board to complete the loop of winding connections. The winding configurations have application in three phase or multiple phase inner rotor or outer rotor electric machine topologies.
Claims23
An electric machine, comprising:
- at least one board including a yoke area of non-conductive material around a connector area, the board including a first surface and an opposite second surface, the first and second surfaces extending from an inner circumferential edge of the at least one board to an outer circumferential edge of the at least one board;
- a plurality of slots in the connector area that open toward the inner circumferential edge;
- at least one conductor bar in each of the slots, each of the at least one conductor bars extending from the slot for connection to one of a second board and another conductor bar extending from an opposite slot of the at least one board;
- and
- a winding configuration including a first end winding in the yoke area on the first surface, the first end winding extending from respective ones of a first portion of the slots to the outer circumferential edge, the winding configuration further including a second end winding in the yoke area on the second surface, the second end winding extending from respective ones of a second portion of the slots to the outer circumferential edge, wherein each of the first and the second end windings is electrically connected to the conductor bars in the plurality of slots.
An electric motor, comprising:
- a stator with a plurality of slots defining a plurality of pole clusters for each phase of the electrical machine;
- and
- a winding configuration on the stator with a plurality of overlapping end windings, wherein a first one of the plurality of overlapping end windings runs in a first direction to lap a first pole cluster of a first phase of the electric motor with a second pole cluster of the first phase, and further wherein a second one of the plurality of overlapping end windings runs in a second direction opposite the first direction to lap a third pole cluster of the first phase with the second pole cluster, and further wherein a third one of the plurality of overlapping end windings runs in the first direction to lap the third pole cluster with a fourth pole cluster of the first phase.
An electric motor, comprising:
- at least one board with a plurality of slots, the plurality of slots defining at least two phase clusters for each phase of the electrical machine, wherein the at least two phase clusters in each phase are separated by one of the phase clusters of each the other phases;
- at least one conductor bar in respective ones of the plurality of slots;
- a winding configuration on the stator, the winding configuration including:
- a first end winding connecting a first phase cluster of a first phase to a second phase cluster of the first phase;
- a second end winding overlapping the first end winding and connecting a first phase cluster of a second phase to a second phase cluster of the second phase;
- and
- a third end winding overlapping the first and second end windings, the third end winding connecting a first phase cluster of a third phase to a second phase cluster of the third phase.
Dependencies are inferred from the claim text.